Table 2.
Tweets matching each symptom keyword group
| Symptom | Number of tweets |
|---|---|
| Headache | 42947 |
| Vomit | 30429 |
| Hayfever | 24175 |
| Sore throat | 21744 |
| Pain | 15142 |
| Malaise | 12354 |
| Flu | 10913 |
| Cough | 9589 |
| Tonsillitis | 7283 |
| Common cold | 6768 |
| Infection | 5955 |
| Abdominal pain | 5582 |
| Sneeze | 5131 |
| Asthma | 4457 |
| Shortness of breath | 4037 |
| Earache | 2990 |
| Nasal congestion | 2930 |
| Tremor | 2727 |
| Itch | 2410 |
| Anxiety | 2250 |
| Fever | 2198 |
| Nosebleed | 1971 |
| Faint | 1944 |
| Skin rash | 1633 |
| Cramp | 1444 |
| Diarrhea | 1365 |
| Chest pain | 1293 |
| Swollen gland | 1138 |
| Conjunctivitis | 941 |
| Stinging sensation | 891 |
| Bleeding | 854 |
| Chickenpox | 835 |
| Runny nose | 785 |
| Swelling | 692 |
| Meningitis | 641 |
| Pneumonia | 622 |
| Seizure | 413 |
| Constipation | 389 |
| Palpitation | 360 |
| Norovirus | 239 |
| Neck pain | 203 |
| Scarlet fever | 142 |
| Dehydration | 68 |
| Dysentery | 28 |
| Tearing | 16 |
| Dry mouth | 10 |